import java.util.Scanner;

public class Target1 {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        int target=sc.nextInt();

        int []arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        for(int i=0;i<n-1;i++){
            for(int j=i+1;j<n;j++){
                if(arr[i]+arr[j]==target){
                    System.out.println("["+i+","+j+"]");
                    return;
                }
            }
        }
        System.out.println("-1");
    }
}
